Department of Biological Sciences Texas Southern University BIO 431 Radiation Bi

Question

Department of Biological Sciences Texas Southern University BIO 431 Radiation Biology Test 1.2018 Speed of light 2.9979 x 108 m s Avogadro Number 6.022137 x 1023 mol Comversion factors : for Amin g 9x1010 kJ/g Conversion factors : for in kg. 9 x 1016 J/kg 1 Coulomb-6.2415 x 1018 elementary particles leV1.602177x 10-19 J 1 MeV = 1.602177 x 10-13J Change in 1 mass unit (I u) mass corresponds to 931.494 Mev I. Who first proposed that all matter was composed of small indivisible particles called atoms, in order to reconcile two conflicting schools of thought on the nature of reality A. J. Dalton B. J.J. Thomson C. A. Einstein D. E. Rutherford/N. Bohr 2. The "plum pudding model" of nature was postulated by: 3. What is the composition of orbitals on the L shell of an atom? 4. There are two stable isotopes of carbon occurring in nature in significant quantity: A. John Dalton B. J.J. Thomson C. Emest Rutherford D. Robert Millikan 12C (relative mass 12.000000) and "C (relative mass l 3-003354)·PC occurs in 98.892 % and 'C in 1.108 %. Calculate the relative atomic mass of carbon. A. 12.230. B. 13.035. C. 12.089. D. 12.011. E. 12.569 5. Atomic number of Plutonium is 94. The isotope used for nuclear fission is 23"Pu. Calculate the ratio of the number of neutrons in its nucleus to the number of protons. A. 1.54. B. 1.89. C. 2.34. D. 1.64. E. 2.24 6. What is the force that holds together nucleons in a nucleus of an atom? a. gravitational force b coulomb force c. strong nuclear force d. mass force e. covalent force

Explanation / Answer

1 Ans : J Dalton

2 Ans: J J Thomson

3 Ans: 1S 3P

4 Ans : 12.011

6 Ans: Strong Nuclear Force

9 Ans: No change at all

10 Ans : Isotope

12 Ans: 2.345

17 ans : E

1.60217733x10-19c

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